A 10-year old girl killed 16 people in a suicide bombing in the northeastern Nigeria city of Damaturu on Sunday.
The girl detonated her explosives next to a crowded market as shoppers were being screened by security services. According to the BBC, around 50 people were injured.
The city has already faced two other suicide bombings in July alone.
Although Boko Haram hasn't claimed responsibility for the attacks, the Islamist group has carried out a string of similar bombings recently. The renewed violence comes after Nigerian forces successfully pushed the group back earlier this year in a concerted offensive.
Cameroon has also seen an uptick in violence; more than 60 have been left dead in a spate of recent Boko Haram–style suicide bombings. On Saturday, a suicide bomb killed at least 10 people in the north of the country close to the Nigerian border, the Associated Press reports.
Boko Haram has promised to attack Cameroon because of its support of Nigeria's fight against the jihadist group. According to the AP, Cameroon has since closed many mosques in the north in an attempt to control the violence.